The law condemns homosexuality because it is unfruitful and not profitable to mankind's perpetuity or continuation. If homosexuality could produce offspring, it would not be outlawed. However, the laws that WERE *back then* are still the same laws now, albeit we have been freed from the curse of sin and death by the gospel.
Yet still Jesus has made statements which exalt the law, (seeing as Jesus, being Lord, MADE the law) -
Mat 5:18 For verily I say unto you, Till heaven and earth pass, one jot or one tittle shall in no wise pass from the law, till all be fulfilled*.
Mat 5:19 Whosoever therefore shall break one of these least commandments, and shall teach men so, he shall be called the least in the kingdom of heaven: but whosoever shall do and teach them, the same shall be called great in the kingdom of heaven.
Mat 5:20 For I say unto you, That except your righteousness shall exceed the righteousness of the scribes and Pharisees, ye shall in no case enter into the kingdom of heaven.
Eph 5:5 For this ye know, that no whoremonger, nor unclean person, nor covetous man, who is an idolater, hath any inheritance in the kingdom of Christ and of God.
What --I-- don't understand is why Christians so often toot the horn about homosexuality, but they speak nothing of covetousness or idolatry, both of which are very awful sins, or pride (hint hint christian peoplez), repent of pride, please. Jesus was meek, please, be meek. You can speak the truth with authority and still be meek.